==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc900001b7960 by task ksoftirqd/1/21
CPU: 1 PID: 21 Comm: ksoftirqd/1 Not tainted 6.1.96-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
print_report+0x15f/0x4f0 mm/kasan/report.c:395
kasan_report+0x136/0x160 mm/kasan/report.c:495
profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
profile_tick+0xee/0x170 kernel/profile.c:339
tick_sched_handle kernel/time/tick-sched.c:255 [inline]
tick_sched_timer+0x390/0x550 kernel/time/tick-sched.c:1501
__run_hrtimer kernel/time/hrtimer.c:1686 [inline]
__hrtimer_run_queues+0x5a7/0xe50 kernel/time/hrtimer.c:1750
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 c2 b8 4c f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 67 06 c9 f6 65 8b 05 08 13 6d 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc900001b7960 EFLAGS: 00000206
RAX: 0f5f17d2c61fa600 RBX: 1ffff92000036f30 RCX: ffffffff91c94103
RDX: dffffc0000000000 RSI: ffffffff8aec0240 RDI: 0000000000000001
RBP: ffffc900001b79f0 R08: dffffc0000000000 R09: fffffbfff19c23c9
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000036f2c R14: ffffc900001b7980 R15: 0000000000000246
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
folio_wake_bit+0x37b/0x560 mm/filemap.c:1172
mpage_end_io+0x1e9/0x300 fs/mpage.c:53
req_bio_endio block/blk-mq.c:777 [inline]
blk_update_request+0x53b/0x1010 block/blk-mq.c:922
blk_mq_end_request+0x3a/0x70 block/blk-mq.c:1047
blk_complete_reqs block/blk-mq.c:1127 [inline]
blk_done_softirq+0xf8/0x140 block/blk-mq.c:1132
handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
run_ksoftirqd+0xc6/0x120 kernel/softirq.c:938
smpboot_thread_fn+0x52c/0xa30 kernel/smpboot.c:164
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
The buggy address belongs to stack of task ksoftirqd/1/21
and is located at offset 0 in frame:
_raw_spin_unlock_irqrestore+0x0/0x130
This frame has 1 object:
[32, 40) 'flags.i.i.i.i'
The buggy address belongs to the virtual mapping at
[ffffc900001b0000, ffffc900001b9000) created by:
copy_process+0x637/0x4060 kernel/fork.c:2098
The buggy address belongs to the physical page:
page:ffffea000049ec80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x127b2
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x0(), pid 1, tgid 1 (swapper/0), ts 1989993704, free_ts 0
create_dummy_stack mm/page_owner.c:67 [inline]
register_early_stack+0x86/0xe0 mm/page_owner.c:83
init_page_owner+0x3a/0x7db mm/page_owner.c:93
invoke_init_callbacks mm/page_ext.c:126 [inline]
page_ext_init+0x727/0x782 mm/page_ext.c:518
kernel_init_freeable+0x450/0x60f init/main.c:1624
page_owner free stack trace missing
Memory state around the buggy address:
ffffc900001b7800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900001b7880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc900001b7900: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
^
ffffc900001b7980: 00 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900001b7a00: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 f2 f2
==================================================================
----------------
Code disassembly (best guess):
0: 9c pushf
1: 8f 44 24 20 pop 0x20(%rsp)
5: 42 80 3c 23 00 cmpb $0x0,(%rbx,%r12,1)
a: 74 08 je 0x14
c: 4c 89 f7 mov %r14,%rdi
f: e8 c2 b8 4c f7 call 0xf74cb8d6
14: f6 44 24 21 02 testb $0x2,0x21(%rsp)
19: 75 4e jne 0x69
1b: 41 f7 c7 00 02 00 00 test $0x200,%r15d
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 67 06 c9 f6 call 0xf6c90696 <-- trapping instruction
2f: 65 8b 05 08 13 6d 75 mov %gs:0x756d1308(%rip),%eax # 0x756d133e
36: 85 c0 test %eax,%eax
38: 74 3f je 0x79
3a: 48 rex.W
3b: c7 .byte 0xc7
3c: 04 24 add $0x24,%al
3e: 0e (bad)
3f: 36 ss